14 Jul
2011
14 Jul
'11
7:03 a.m.
There were (still are) two BNC connectors on the back of the VT100.
One was video out which I used with the camera sync input and the other is
video in. This locked the picture to the data video.
Regards
?
Rod Smallwood
-----Original Message-----
From: cctech-bounces at classiccmp.org [mailto:cctech-bounces at classiccmp.org]
On Behalf Of Peter Coghlan
Sent: 13 July 2011 19:37
To: cctech at classiccmp.org
Subject: Re: VT fixums
For all of its faults it was still the market leader.
Did you know you could plug a B&W TV camera into the back of a VT100 and
see
the picture on the screen? I did it at Dec Park
(Reading UK) one day and
drew a large crowd.
I can remember the tiny on/off switch and the vertical DB25 connector but
that
is all I recall about the back of a VT100. I guess there must have been a
BNC
connector? I do vaguely recall occasionally having to dissuade academic
staff
from plugging their thinwire ethernet segment into the
back of their
terminal but
I don't remember which type. I suppose it was probably the VT100.
Did the terminal automatically sense an external video connection or was it
necessary to manually disable the video generated internally? I guess it was
probably expecting 525 lines, 60Hz but could cope with 625 lines, 50Hz?
My VT220 has a BNC connector on the back but in this case it is an output.
It
produces a nice picture on a monochrome 625 line 50Hz monitor after
adjusting
the vertical hold.
Regards,
Peter Coghlan.